Chemistry: Electronic and Molecular Geometry

[erika123500312]

This was so helpful! Thank you so much for this video! :D

[Ramzinator24]

This is a great video. I'm glad i checked it out! However, I have a question. How come the molecular geometry of the square pyramid (Octahedral) looks alot like that of the trigonal bipyramid (Trigonal Bipyramid)? From my understanding, the square pyramid is supposed to have one lone pair of electrons. Did you just simply forget to draw it on the diagram or assumed that we'd know there was a lone pair present? I'd like to know as soon as possible. Thanks in advance.

[z5318954897a]

yes omg thank you so much.. this helped a tonnnnn... :)))

[0MrLarson]

her hands scare me!!!



[socerjjj]

very clear and concise. thank you...my prof tried to explain this to 100 students with balloons and everyone was lost...

[zacmiley12]

Uhm how do you know where to place the lone pairs? I had heard that they are placed where the 90 degree angles are?? I'm really confused please help.

[MrEnvy999]

@zacmiley12 The lone pairs are placed beside the least electronegative atom (which occupies the central position). For example, in IF5, there is one lone pair which is placed beside the iodine atom in the central position.

[Varleyh1]

nice that was so good

[Claudiaaa28]

but why arent you my chem teacher!!!

Thank you! Now this actually makes sence.

[heejung3014]

Thank you so much!! you are the lifesaver!!

[chicagosailor88]

Super CREEPY little girl laugh at 3:17!!!

[mio68df]

thanks! this video really helped, specially with the models. keep up the vids! by the way, whats the song at the end? please answer

[ic3cr3amxx]

found this really helpful! Thanks alot :)

[uhmnahh]

thank you so much for sharing this! it's a lot of help!

[Meshkabntal3raq]

thank you so much. that helped me alot

[Sluo1947]

thank you so much !

[zhaizor]

thanks, im studying for my MCAT and for some reason I never learned this well, so you helped me out, appreciate it!

[metelskiy]

Helpful, thanks

[metallicanogo]

I was watching this at night and when the little girl laugh i had to rewind the video to make sure it wasnt in person o.O

[JCarter3000]

amazing

[aliyahrahman1001]

I just want to thank you sooo much. I was so confused and i could not visualize what was going on, but the way you showed this made it so clear.

[Zypakoi]

this is great-- now i get the names and angles that correspond, however, how can you turn the molecular, lewis dot, or structural formulas into their angles? i mean how am i supposed to know what,... oh say, SO4^2- is in angles.... even if i know the dot structure??

great videos you post :) thanks.

[Camillio]

Seriously saved me!

[MrWafflesTheBear]

AWESOME! thanks! 

[aragstrid]

thank you so much!

[NiikkiiCrawford]

i love the little girls laugh at the seesaw haha

[TrueShadowJS]

helpful to just a 3D model. good video!

[rjmadz]

thnx for the help dude

[greg9210]

useful but which one did you show first molec or elect

[TheBaffometto]

really useful, thanks!

[Kilika808]

Great tutorial. Very easy to understand with both the paper and ball-and-stick models. Thank you!

[biskitismydoggie]

this is the best, it really helped.

[justsmile4me]

Thanks! This works really well for reviewing. Especially since my AP Chem final's tomorrow!

Now for bond angles... D:

[NoGuyComesClose]

Excellent!

[xDaznkid]

wow thx this helped me alot, this is way easier than studying

[wnpwmp]

thanks for sharing

it is really helpful

[Amybeth851]

What a great way to study, thanks so much!

[DeeDeeTheDee]

PLAYNAAR

[falloutheartbreaker]

i watched it!

-brenna

[richyedd]

thanks great insight!

[whats12345aa]

gud 1

from uk

[shinobi65251]

i remember my first beer....

[nellichka]

i wish you were my chemistry professor. Thanks you helped a lot!

[ateberns1]

this will really help

[27ruby]

omg thank you soooo much

i have final tmr

[candttandc]

I LOVE YOU!!!!!

[xcguy411]

i think i have thanked u b4. But ima a thank you again, i have a final in 7 hours..and this is a good review! LIFESAVER

[juanjose00]

thanks mate

[molious101]

thank you so much. Your video is extremely informative. I tried reading the book but I just became more confused. thank you again. Keep up the good videos =D

[SumRandomDude]

god... do all of us have the bad habit of studding right before a test????XD

[globalpie]

test tomorrow also! helped a lot! thanks!!!!!!

[adseipsum]

GREAT JOB.  TEST ON THIS TOMORROW.

[DeathFromAboveIsHere]

wish i would have use this to study earlier this really helped :D

[fichundar]

that was v.helpful...thanx

[shaitan94]

so water molecule is bent(wedge) shaped molecule ?

Who was that laughing at 3:17

[shaitan94]

so water molecule is bent(wedge) shaped molecule

[LeeDiddy990]

This makes so much more sense thanks for the help.

[cdwhitehead]

Thank you for doing this!! You explain this way better than my Chem teacher!!! :)

[desigangster05]

@cdwhitehead bet you we have the same chem teacher lmao

[Hinchy87]

Thank you thank you thank you! I am now a subscriber to your videos! They are amazing. I didn't understand this before I watched your videos!

[InfernoX17]

nice video

but the chem guy owns u =P

[Tiphuneew]

you're a dick. The chemguy has nothing on TTUchem!

[IronJackalTw]

Tiphuneew,

Chem Guy is very good! He does cover some of those mid-level Chem stuff very well and more heavy in the math department, too!

TTUchem is good as well for stuffs she cover, which are more in bonding and structure! Of course, those are learned very early on!

Anyhow, Chemistry is a very broad subject! They are plenty of stuffs and complex stuffs that both have not even covered yet!!

PS. InfernoX17 did say "Nice Video"!! =)

[BigRed3117]

watching this so i can do my homework lol....

[alianne]

the little girl laughing noise for the see saw part scared me

[arisanurailiz1990]

Excellent!thanks a lot! :DDD

but..how we can determine the molecule is polar or non polar? can u help me? im still blurr b0ut that.. :)

[Lia360]

That was an awesome tutorial. Thank you so, so much. That really helped a lot =)))

[Trutrojan88]

Thanks for making me feel smart! What an awesome video! I will now put it to my favs

[OrganicWebhead]

I cant find enough words to thank you for these wonderfull videos. Im a chemistry student in university, and this videos are so good to help understand so many details.

You are an excelent teacher.

Please keep up the excelent work

thank you =)

[big0921]

Greetings from South Africa! This is greagt thanks a million got a test tomorrow!

[patziteco]

This is a really nice explanation. Greetings from Oklahoma. I have a quiz tomorrow.

[BryanChabolla]

cool this is my studying lol for my test tomorow i just needed to know the degrees but i have notes :D thanks :)

[TTUchem1010]

Yeah, if you understand this, you should be able to identify the degrees quite easily. Do you know how to predict if the molecule is polar or not?

[TTUchem1010]

One more thing: lone pairs generally take up more "space" than bonding pairs. The electronic geometry of water is tetrahedral (predicted 109.5 degrees), but the bond angle of water is actually 104.5 degrees.

[BryanChabolla]

yea i did not know how.. i just learned the day after the test.. haha but i just need to study degrees thanks yoU!!!:)

[phoisgood714]

How do you know if it is polar or not?

[dbrrmsdn]

you have to compare atoms' elctronegativity. If the difference of two atoms' electonegativity is less than 0.5, it is non-polar and if it is between 0.5 and 2.0, it is polar and if it is greater than 2.0, it is ionic bond.

[supernaturalmars]

i'm pretty sure that you can tell from the geometry if it is polar or not. if the geometry is not symmetrical than the dipole moments (which are vectors) will not cancel each other out, creating an overall dipole moment. basically if there are lone pairs the molecule is polar

[jennirocks18]

@TTUchem1010 how do you know it is polar or not?

[zwranfire]

thanks